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#76 2013-09-19 01:07:56

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

Can you show me how you would solve this? I have the answers is you want to see them

View Image: test10.gif View Image: test6.gif View Image: test7.gif View Image: test8.gif View Image: test9.gif

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#77 2013-09-19 02:39:40

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Start by doing the subtraction on the left side.

Now cross multiply.

Factor,

You have x = 0 and x = -2. We reject the 0 solution so x = -2.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#78 2013-09-19 03:54:28

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

1/2 right?

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#79 2013-09-19 03:58:16

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

For the first one?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#80 2013-09-19 03:59:15

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

yes

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#81 2013-09-19 04:00:42

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

In post #77 I solved it already, the answer is -2.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#82 2013-09-19 04:03:12

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

ok youre right I see It now what abou the next one

Last edited by Derick Mixon (2013-09-19 04:04:48)

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#83 2013-09-19 04:04:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Give me some time to do the other ones. I will post them right here.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#84 2013-09-19 04:06:50

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

ok thanks

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#85 2013-09-19 04:40:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Multiply both sides by 20.

Clean it up.

Add 8 to both sides.

Subtract 5x from both sides.

Divide both sides by 15 and you get x = - ( 17 / 15).


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#86 2013-09-19 05:17:10

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

I have that as well. ok the next question

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#87 2013-09-19 09:45:36

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Times both sides by 24.

Add 9 to both sides.

Subtract 8x from both sides.

x = 1


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#88 2013-09-19 11:51:36

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

are you done for the night?

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#89 2013-09-19 14:20:39

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Hi;

Yes, I am going to eat.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#90 2013-09-20 00:37:08

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

Did you do the rest yet?

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#91 2013-09-20 00:40:34

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Take 1 / 9 away from both sides.

Flip them both,

x = 3

For the last one:

Times both sides by 15x.

Divide both sides 4.

x = ( 14 / 4 ) = ( 7 / 2 )


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#92 2013-09-21 05:17:02

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

Are you in today?

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#93 2013-09-21 05:19:51

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

Yes, I am.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#94 2013-09-21 05:45:47

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

State the domain of y = x2

 
State the range of y = x2

 
State the domain of y = x2 + 2

 
State the range of y = x2  + 2

 
State the domain of y = 2x2 + 3

 
State the range of y = 2x2 + 3

 
State the domain of y = x2 – 5

 
State the range of y = x2  - 5

 
State the domain of y = -x2

 
State the range of y = –x2

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#95 2013-09-21 05:54:31

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

Can you show me how to solve them?

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#96 2013-09-21 05:57:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

What is x2?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#97 2013-09-21 06:24:06

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

The x value

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#98 2013-09-21 06:28:58

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

And the 2, is that a power?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#99 2013-09-21 11:18:22

Derick Mixon
Member
Registered: 2013-09-03
Posts: 65

Re: Math

yes

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#100 2013-09-23 08:26:49

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 83,086

Re: Math

State the domain of y = x^2


State the range of y = x^2

I get the domain as R and the range as [0,∞)

State the domain of y = x^2 + 2


State the range of y = x^2  + 2

Domain is R and the range is all positive reals greater than or equal to 2.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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